ddl,executor: fix usages of getting regions from pd client (#63371)

[ti-chi-bot]

This is an automated cherry-pick of #63371

What problem does this PR solve?

Issue Number: close #61702

Problem Summary:

The old impl doesn't work in next-gen because the keys are not encoded by the keyspace.

What changed and how does it work?

• Use store.GetCodec() to encode region ranges before sending get-region requests.
• Add a test for information_schema.tikv_region_status.

Check List

Tests

• Unit test
• Integration test
• Manual test (add detailed scripts or steps below)
  Sysbench 20,000,000 rows (tableSizeInBytes=4.092GiB):

[2025/09/04 14:44:00.614 +08:00] [INFO] [reorg_util.go:134] ["initialize reorg meta"] [keyspaceName=keyspace1] [category=ddl] [jobSchema=test] [jobTable=sbtest1] [jobType="add index"] [enableDistTask=true] [enableFastReorg=true] [targetScope=dxf_service] [maxNodeCount=1] [tableSizeInBytes=4.092GiB] [concurrency=1] [batchSize=256]

Before this PR:

mysql> select * from information_schema.tikv_region_status where table_id = 7;
+-----------+--------------------+--------------------+----------+---------+------------+----------+----------+------------+--------------+--------------+----------------+----------------+---------------+---------------+------------+------------------+------------------+-------------------------+---------------------------+
| REGION_ID | START_KEY          | END_KEY            | TABLE_ID | DB_NAME | TABLE_NAME | IS_INDEX | INDEX_ID | INDEX_NAME | IS_PARTITION | PARTITION_ID | PARTITION_NAME | EPOCH_CONF_VER | EPOCH_VERSION | WRITTEN_BYTES | READ_BYTES | APPROXIMATE_SIZE | APPROXIMATE_KEYS | REPLICATIONSTATUS_STATE | REPLICATIONSTATUS_STATEID |
+-----------+--------------------+--------------------+----------+---------+------------+----------+----------+------------+--------------+--------------+----------------+----------------+---------------+---------------+------------+------------------+------------------+-------------------------+---------------------------+
|        14 | 72FFFFFF00000000FB | 7800000100000000FB |        7 | test    | sbtest1    |        1 |        1 | k_1        |            0 |         NULL | NULL           |              1 |            11 |             0 |          0 |                1 |                0 | NULL                    |                      NULL |
|        14 | 72FFFFFF00000000FB | 7800000100000000FB |        7 | test    | sbtest1    |        0 |     NULL | NULL       |            0 |         NULL | NULL           |              1 |            11 |             0 |          0 |                1 |                0 | NULL                    |                      NULL |
+-----------+--------------------+--------------------+----------+---------+------------+----------+----------+------------+--------------+--------------+----------------+----------------+---------------+---------------+------------+------------------+------------------+-------------------------+---------------------------+
2 rows in set (1 min 20.46 sec)

mysql> show table sbtest1 regions;
+-----------+------------------------------------------------+------------------------------------------------+-----------+-----------------+-------+------------+---------------+------------+----------------------+------------------+------------------------+------------------+
| REGION_ID | START_KEY                                      | END_KEY                                        | LEADER_ID | LEADER_STORE_ID | PEERS | SCATTERING | WRITTEN_BYTES | READ_BYTES | APPROXIMATE_SIZE(MB) | APPROXIMATE_KEYS | SCHEDULING_CONSTRAINTS | SCHEDULING_STATE |
+-----------+------------------------------------------------+------------------------------------------------+-----------+-----------------+-------+------------+---------------+------------+----------------------+------------------+------------------------+------------------+
|       270 | t_7_i_1_038000000001089dc20380000000000c530300 | t_7_r_4716102                                  |       271 |               1 | 271   |          0 |             0 |          0 |                 1031 |          4741227 |                        |                  |
|       272 | t_7_r_4716102                                  | t_7_r_9358899                                  |       273 |               1 | 273   |          0 |             0 |          0 |                 1029 |          4670598 |                        |                  |
|       274 | t_7_r_9358899                                  | t_7_r_14381182                                 |       275 |               1 | 275   |          0 |             0 |          0 |                 1040 |          5041457 |                        |                  |
|       146 | t_7_r_14381182                                 | t_281474976710596_                             |       147 |               1 | 147   |          0 |             0 |          0 |                 1177 |          5735440 |                        |                  |
|       276 | t_7_                                           | t_7_i_1_0380000000002426cb03800000000054a65e   |       277 |               1 | 277   |          0 |             0 |          0 |                    1 |                0 |                        |                  |
|       278 | t_7_i_1_0380000000002426cb03800000000054a65e   | t_7_i_1_03800000000098f7150380000000002ccea1   |       279 |               1 | 279   |          0 |             0 |          0 |                   72 |          9998595 |                        |                  |
|       280 | t_7_i_1_03800000000098f7150380000000002ccea1   | t_7_i_1_038000000001089dc20380000000000c530300 |       281 |               1 | 281   |          0 |             0 |          0 |                   72 |         10001405 |                        |                  |
+-----------+------------------------------------------------+------------------------------------------------+-----------+-----------------+-------+------------+---------------+------------+----------------------+------------------+------------------------+------------------+
7 rows in set (0.01 sec)

After this PR:

mysql> show table sbtest1 regions;
+-----------+-------------------------------------------------+-------------------------------------------------+-----------+-----------------+-------+------------+---------------+------------+----------------------+------------------+------------------------+------------------+
| REGION_ID | START_KEY                                       | END_KEY                                         | LEADER_ID | LEADER_STORE_ID | PEERS | SCATTERING | WRITTEN_BYTES | READ_BYTES | APPROXIMATE_SIZE(MB) | APPROXIMATE_KEYS | SCHEDULING_CONSTRAINTS | SCHEDULING_STATE |
+-----------+-------------------------------------------------+-------------------------------------------------+-----------+-----------------+-------+------------+---------------+------------+----------------------+------------------+------------------------+------------------+
|       274 | t_15_i_1_038000000001089dc20380000000000c475b00 | t_15_r_5337962                                  |       275 |               1 | 275   |          0 |             0 |          0 |                 1027 |          5366615 |                        |                  |
|       276 | t_15_r_5337962                                  | t_15_r_10418020                                 |       277 |               1 | 277   |          0 |             0 |          0 |                 1034 |          5097457 |                        |                  |
|       278 | t_15_r_10418020                                 | t_15_r_14976190                                 |       279 |               1 | 279   |          0 |             0 |          0 |                 1010 |          4609699 |                        |                  |
|       146 | t_15_r_14976190                                 | t_281474976710596_                              |       147 |               1 | 147   |          0 |             0 |          0 |                 1127 |          5124631 |                        |                  |
|       280 | t_15_                                           | t_15_i_1_0380000000002426cb0380000000005494a1   |       281 |               1 | 281   |          0 |             0 |          0 |                    1 |                0 |                        |                  |
|       282 | t_15_i_1_0380000000002426cb0380000000005494a1   | t_15_i_1_03800000000098f7150380000000002cc988   |       283 |               1 | 283   |          0 |             0 |          0 |                   72 |          9998595 |                        |                  |
|       284 | t_15_i_1_03800000000098f7150380000000002cc988   | t_15_i_1_038000000001089dc20380000000000c475b00 |       285 |               1 | 285   |          0 |             0 |          0 |                   72 |         10001405 |                        |                  |
+-----------+-------------------------------------------------+-------------------------------------------------+-----------+-----------------+-------+------------+---------------+------------+----------------------+------------------+------------------------+------------------+
7 rows in set (0.01 sec)

mysql> select * from information_schema.tikv_region_status where table_id = 15;
+-----------+--------------------------------------------------------------------------------------------------------------+--------------------------------------------------------+----------+---------+------------+----------+----------+------------+--------------+--------------+----------------+----------------+---------------+---------------+------------+------------------+------------------+-------------------------+---------------------------+
| REGION_ID | START_KEY                                                                                                    | END_KEY                                                | TABLE_ID | DB_NAME | TABLE_NAME | IS_INDEX | INDEX_ID | INDEX_NAME | IS_PARTITION | PARTITION_ID | PARTITION_NAME | EPOCH_CONF_VER | EPOCH_VERSION | WRITTEN_BYTES | READ_BYTES | APPROXIMATE_SIZE | APPROXIMATE_KEYS | REPLICATIONSTATUS_STATE | REPLICATIONSTATUS_STATEID |
+-----------+--------------------------------------------------------------------------------------------------------------+--------------------------------------------------------+----------+---------+------------+----------+----------+------------+--------------+--------------+----------------+----------------+---------------+---------------+------------+------------------+------------------+-------------------------+---------------------------+
|       274 | 7800000174800000FF000000000F5F6980FF0000000000000103FF8000000001089DC2FF0380000000000C47FF5B00000000000000F9 | 7800000174800000FF000000000F5F7280FF0000000051736A00FE |     NULL | NULL    | NULL       |        0 |     NULL | NULL       |            0 |         NULL | NULL           |              1 |            72 |             0 |          0 |             1027 |          5366615 | NULL                    |                      NULL |
|       276 | 7800000174800000FF000000000F5F7280FF0000000051736A00FE                                                       | 7800000174800000FF000000000F5F7280FF000000009EF76400FE |     NULL | NULL    | NULL       |        0 |     NULL | NULL       |            0 |         NULL | NULL           |              1 |            70 |             0 |          0 |             1034 |          5097457 | NULL                    |                      NULL |
|       278 | 7800000174800000FF000000000F5F7280FF000000009EF76400FE                                                       | 7800000174800000FF000000000F5F7280FF00000000E484BE00FE |     NULL | NULL    | NULL       |        0 |     NULL | NULL       |            0 |         NULL | NULL           |              1 |            71 |             0 |          0 |             1010 |          4609699 | NULL                    |                      NULL |
|       146 | 7800000174800000FF000000000F5F7280FF00000000E484BE00FE                                                       | 78000001748000FFFFFFFFFFFFC4000000FC                   |     NULL | NULL    | NULL       |        0 |     NULL | NULL       |            0 |         NULL | NULL           |              1 |            71 |             0 |          0 |             1127 |          5124631 | NULL                    |                      NULL |
+-----------+--------------------------------------------------------------------------------------------------------------+--------------------------------------------------------+----------+---------+------------+----------+----------+------------+--------------+--------------+----------------+----------------+---------------+---------------+------------+------------------+------------------+-------------------------+---------------------------+
4 rows in set (0.01 sec)

• No need to test

  • I checked and no code files have been changed.

Side effects

• Performance regression: Consumes more CPU
• Performance regression: Consumes more Memory
• Breaking backward compatibility

Documentation

• Affects user behaviors
• Contains syntax changes
• Contains variable changes
• Contains experimental features
• Changes MySQL compatibility

Release note

Please refer to Release Notes Language Style Guide to write a quality release note.

None

[ti-chi-bot]

@D3Hunter This PR has conflicts, I have hold it.
Please resolve them or ask others to resolve them, then comment /unhold to remove the hold label.

[ti-chi-bot]

@ti-chi-bot: ## If you want to know how to resolve it, please read the guide in TiDB Dev Guide.

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[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: D3Hunter, tangenta

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[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2025-09-05 01:32:46.066956311 +0000 UTC m=+143510.050053759: ☑️ agreed by tangenta.
• 2025-09-05 01:51:35.513845862 +0000 UTC m=+144639.496943309: ☑️ agreed by D3Hunter.

[D3Hunter]

/retest

[D3Hunter]

/retest

[D3Hunter]

/retest

[D3Hunter]

/retest